/**
 * Copyright (c) 2007-2008 Nearchos Paspallis
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/**
 * AspectSense
 *
 * Middleware for annotation-based, context-aware and adaptive services for
 * mobile and ubiquitous computing
 *
 * This project is an open-source effort, initiated by Nearchos Paspallis as
 * part of his PhD work at the University of Cyprus (http://www.ucy.ac.cy).
 *
 * More information about the project is available at "http://aspectsense.org".
 */

package org.aspectsense.context.events;

import org.aspectsense.context.Query;
import org.aspectsense.context.QueryResults;

import java.util.EventObject;

/**
 * @author Nearchos Paspallis [nearchos@cs.ucy.ac.cy]
 *         Date: Dec 17, 2007
 *         Time: 9:22:32 AM
 */
public class ContextChangedEvent extends EventObject
{
    private final Query query;
    private final QueryResults queryResults;

    public ContextChangedEvent(
            final Object source,
            final Query query,
            final QueryResults queryResults)
    {
        super(source);

        this.query = query;
        this.queryResults = queryResults;
    }

    /**
     * Returns the {@link org.aspectsense.context.Query} which was associated
     * with the generation of this event.
     *
     * @return an instance of {@link org.aspectsense.context.Query}
     */
    public Query getQuery()
    {
        return query;
    }

    /**
     * Returns the results of the corresponding
     * {@link org.aspectsense.context.Query}.
     *
     * @return an instance of {@link org.aspectsense.context.QueryResults}
     */
    public QueryResults getQueryResults()
    {
        return queryResults;
    }

    public String toString()
    {
        final StringBuilder stringBuilder = new StringBuilder();

        stringBuilder.append("Event{source=").append(source)
                .append(", query=").append(query).append(", queryResults=")
                .append(queryResults).append("}");

        return stringBuilder.toString();
    }
}